Self-oiling connecting-rod.



PATENTED AUG. 11, 1908. 0. 0'. HEDSTROMJ SELF 01mm CONNECTING ROD;

, Ira Jen Carl QHeaZr/Zrm 5y APPLICATION FILED DEC}. 21, 1907.

crank-shaft b and stud 1),

UNITED STATES CARL O. HEDSTROM, OF SPRINGFIELD, MASSACHUSETTS.

SELF-OILING C ON N E CTING-ROD.

Specification of Letters Patent.

Patented Aug. 11, 1908.

Application filed December 21, 1907. Serial N 0. 407,484.

To all. whom it mayconcern:

Be it known that I, CARL OSCAR I-IED- STROM, a citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusctts, have invented new and useful Improvements in Self-Oiling Connecting-Rods, of which the following is a specification.

This invention relates to improvements in oiling devices for connecting-rods and is primarily designed to be used in connection with internal combustion engines, wherein the flv wheel which revolves in oil in the crank easing will throw small quantities of the samq, during its rotary movements, into longitudinally disposed channels in the connecting-rod, and by dripping or running back down the channels will thoroughly oil the crank-shaft bearings by means of suitable oil holes provided in the rod and communicating with the channels, whereby the oil will thoroughly lubricate the bearing boxes of the orank-shaft, as will be fully described in the body of the specification. K

In the drawings forming part of this application,-Figure 1 isa vertical sectional view taken through the main shaft of an internal combustion engine-and showing the casing and fly-wheels in section, and the connectingrod in edge elevation. Fig. 2 is a detail side view of the connecting-rod showing the position ofthe oil passages for conveying the oil to the bearingsat the opposite ends thereof. Fig. 3 is a transverse sectional View of the connecting-rod on the line 33 of Fig. 2.

Referring to the drawings in detail, a designates as a whole the casing containing the and the fly-wheels c, c. It will be noticed that the connectingrod is located between the fl -wheels 0, c, and is connected to the same by means of the wrist-pin d. The forward edge of the connecting-rod e is provided with a groove f, (as shown'clearlyin Fig. 3 in transverse section,)

, and the side of the rod is also provided with channels or grooves g, g. The lower end of the groove or channel f communicates with an oil opening orpassage-way h-that leads down to the bearing ring or bushing 'i on the yvrist-pin (1, while the lower end of the groove or channel surfaces gQg coinincmicates with the oil opening or passage-ways k. v

The faces or side portions 0 of the flywheels 0, in Fig. 1, it will be seen run very close to the edges 2 of the'connecting-rod e,

as indicated by the reference letter m so that as the run and face or side portions 0 of the located in the bottom of the casing (1,, the oil is ,thrown therefrom by centrifugal force into the channels@ and g and also on account of the small space between the side of the connccting-rod and the face side of the flywheels 0 being in such close proximity to the connecting-rod e, the oil is sheared off so to speak, by means of the rod. thus completely filling the groove f. The oil then drips or runs downward in the channels f and gnntil it reaches the oil-holcs h and that lead to the bearing-box or bushing 2' thus thoroughly lubricating the same and the wrist-pin d.

It should be stated that the rotation of the fly-wheels c, c is towards the connecting-rod c, and thus the'oil is thrown from the edge of the wheels directly into the groove The oiL also reaches the grooves or channels f and 9 y "the casing. I It has been foundLfrorn experience that on account of the rapid rotary movement of the fly-wheel and connecting-rods of internal combustion engines there is great difliculty in keeping these hearings well lubricated because the oil is thrown therefrom by centrifugal force. This is also true of the hearing at the other or opposite end of the connectingrod 6, as designated at m. Therefore, in order to thoroughly lubricate the ends of the connecting-rod, I provide the oil openings described above and also provide an oil opening 0 that communicates with theedge portion of the rod, as shown in Fig. 2.

From this construction, it is clear that on account of the connectingrod' having the oil thrown thereon by means of the fly-wheels c and being permitted to run down the chann'elsor grooves 72 and g and through the oil 0 enings h and to the bushing or bearing i t e latter will be thoroughly lubricated and also the oil will be permitted to flow through the opening 0 to the bearing a of the connection rod.

What I claim, is

1. In combination, a crank-shaft, a flywheel theroon, a connecting-rod, the rod being provided with longitudinally disposed channels or grooves leading into openings which terminate in the bearing portion of the rod, whereby when oil is thrown by centrifureason of the oil-spray completely filling fly-wheels c, 0 pass through the oil that is gal force from the edge of the fly wheelinto I the channels or grooves of the rod the'crankshaft bearings will be lubricated.

2. An oiling device for crank-shafts for in-- ternal combustion engines, in combination with said shafts, a casing, a connecting-rod ing, fly-Wheels located in close proximity to the opposite sides of the rod and running in oil contained in'the crank easing-whereby the oil is thrown by centrifugal force into said grooves, asdescribed.

CARL OJ'HEDSTROM.

Witnesses.

K. I. CLEMoNs, H. W. BoWEN, 

